import org.junit.Test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

/**
 * 一、Stream的三个操作步骤：
 *  1.创建Stream
 *  2.中间操作
 *  3.终止操作
 */
public class TestStreamAPI {
    @Test
    public void test1() {
        //1. 可以通过Collection集合提供的stream()或parallelStream()
        List<String> list = new ArrayList<>();
        Stream<String> stream1 = list.stream();

        // 2.通过Arrays中的静态方法stream()获取数组流
        Employee[] emps = new Employee[10];
        Stream<Employee> stream2 = Arrays.stream(emps);

        //3.通过Stream类中的静态方法of()
        Stream<String> stream3 = Stream.of("aa", "bb", "cc");

        //4.创建无限流
        //迭代
        Stream<Integer> stream4 = Stream.iterate(33, (x) -> x+2);
        stream4.limit(10).forEach(System.out::println);

        //生成
        Stream.generate(Math::random).limit(5).forEach(System.out::println);
    }
}
